-- @testpoint: opengauss关键字deref(非保留)，作为函数名，部分测试点合理报错

--关键字不带引号-成功
drop function if exists deref;
create function deref(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
drop function if exists deref;
--关键字带双引号-成功
drop function if exists "deref";
create function "deref"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
drop function if exists "deref";
--关键字带单引号-合理报错
drop function if exists 'deref';
create function 'deref'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带反引号-合理报错
drop function if exists `deref`;
create function `deref`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/